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/*
* Structogram.cpp
*
* Created on: Nov 14, 2017
* Author: naopross
*/
#include "../diagram/Structogram.hpp"
#include <memory>
#include <exception>
namespace samb {
/* iterator nested class */
Structogram::iterator::iterator(Statement::pointer first) {
m_current = first;
}
Structogram::iterator::~iterator() {}
Structogram::iterator& Structogram::iterator::operator++() {
if (m_current->next != nullptr) {
m_current = m_current->next;
}
return *this;
}
Structogram::iterator& Structogram::iterator::operator++(int) {
static iterator old(*this);
old = *this;
operator++();
return old;
}
bool Structogram::iterator::operator==(const iterator& other) const {
if (*this->m_current == *other.m_current) {
return true;
}
return false;
}
bool Structogram::iterator::operator!=(const iterator& other) const {
return !(other == *this);
}
Statement& Structogram::iterator::operator*() const {
if (m_current == nullptr) {
throw std::logic_error("structogram iterator: m_current is nullptr");
}
return *m_current;
}
Statement::pointer Structogram::iterator::operator->() const {
return m_current;
}
/**
* Structogram class methods
*/
Structogram::Structogram(std::string title) {
m_size = 0;
m_title = title;
m_head = Statement::makeStatement(Statement::Type::SCOPE);
m_tail = Statement::makeStatement(Statement::Type::END);
m_head->next = m_tail;
m_head->text = m_title;
}
Structogram::~Structogram() {
/* no need to destroy anything because of smart pointers */
}
std::size_t Structogram::size() const {
return m_size;
}
Structogram::iterator Structogram::insert_after(Structogram::iterator it, Statement::pointer statement) {
if (statement == nullptr) {
throw std::invalid_argument("structogram: attempt to insert a null statement");
}
// TODO: update m_tail
statement->next = it->next;
it->next = statement;
m_size++;
return ++it;
}
Structogram::iterator Structogram::erase_after(iterator it) {
// TODO: error handling IE return a std::pair<iterator, bool>
/* the first statement (scope of the program) cannot be deleted */
if ((*it) == *m_head) {
return it;
}
if (it->next == nullptr) {
return it;
}
it->next = it->next->next;
return it;
}
/* iterator related methods */
Structogram::iterator Structogram::begin() const {
return iterator(m_head);
}
const Structogram::iterator Structogram::end() const {
return iterator(m_tail);
}
} /* namespace structograms */
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